CN204513372U - Coal feeder for circular fluidized bed boiler - Google Patents
Coal feeder for circular fluidized bed boiler Download PDFInfo
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- CN204513372U CN204513372U CN201520049490.4U CN201520049490U CN204513372U CN 204513372 U CN204513372 U CN 204513372U CN 201520049490 U CN201520049490 U CN 201520049490U CN 204513372 U CN204513372 U CN 204513372U
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- spout
- coal spout
- fluidized bed
- bed boiler
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Abstract
The utility model discloses a kind of coal feeder for circular fluidized bed boiler, solve the problem that coal spout that existing coal feeder exists easily blocks, causes boiler often stopping because of disconnected coal.Technical scheme comprises the coal spout and coal sliding tube that connect successively, described coal spout epimere has bend pipe district, described coal spout has rapping apparatus and air-supply arrangement, and described rapping apparatus comprises at least one vibrator being located at coal spout bottom surface and the expansion joint being located at coal spout two ends; Described air-supply arrangement comprises the ajutage being located at coal spout bend pipe district and the multiple guide ducts being located at coal spout perimembranous.The utility model structure is simple, easy and simple to handle, is applicable to various bunker coal, thoroughly solves coal pipe coal blockage problem, ensures that coal spout is unimpeded, and boiler long-term stability is run.
Description
Technical field
The utility model relates to a kind of coal feeder, specifically a kind of coal feeder for circular fluidized bed boiler.
Background technology
Under the situation that coal resource is constantly deficient, the fuel coal of boiler combustion trends towards variation more, especially in southern warm or season in rainy season, bunker coal can not effectively be deposited and be dried, water content is much larger than designing requirement, coal pipe coal blockage situation is caused often to occur, so that boiler stops.
The coal feeder that current CFBB adopts as shown in Figure 1, mainly comprises coal spout 2, coal sliding tube 1 two parts.Coal sliding tube distance is shorter, and delivers coal at coal sliding tube place coal spread wind, therefore and not easily chute blockage.But coal spout part often chute blockage situation occurs, even abnormal serious, cause boiler often because of disconnected coal and stop.
Summary of the invention
The purpose of this utility model is to solve the problems of the technologies described above, there is provided a kind of structure simple, easy and simple to handle, be applicable to various bunker coal, thoroughly solve coal pipe coal blockage problem, guarantee coal spout is unimpeded, ensures the coal feeder for circular fluidized bed boiler that boiler long-term stability is run.
Technical scheme comprises the coal spout and coal sliding tube that connect successively, described coal spout epimere has bend pipe district, described coal spout has rapping apparatus and air-supply arrangement, and described rapping apparatus comprises at least one vibrator being located at coal spout bottom surface and the expansion joint being located at coal spout two ends; Described air-supply arrangement comprises the ajutage being located at bottom surface, coal spout bend pipe district and the multiple guide ducts being located at coal spout perimembranous.
Described rapping apparatus also comprises the spring support for supporting coal spout.
The bending radius of described coal spout bend pipe district bend pipe is 1 ~ 5D.
Be provided with deflector above described ajutage, the front end of described deflector is connected with coal spout tube wall, and rear end and coal spout tube wall tool are blown gap.
Described air-supply gap is 3 ~ 20mm.
The angle of described guide duct and coal spout tube wall is 15 ~ 60 °.
Described ajutage is connected with high pressure air inlet valve and low pressure air inlet valve through pipeline respectively with guide duct, for introducing high pressure or low pressure cold wind.
Described pipeline be equipped with heater and be provided with bypass, needing, during heating, high pressure cold wind or low pressure cold wind are introduced heater, for heating and regulate the temperature of wind, when not needing heating, then pass into coal spout by bypass, to reduce blast pipe resistance.
The effect of rapping apparatus: increase expansion joint at coal spout two ends, and coal spout is by stable and support during rapping to coordinate spring support to ensure, vibrator is increased in coal spout bottom surface, make vibrator uninterrupted or be interrupted rapping coal spout, prevent bunker coal from stopping in coal spout, promote that bunker coal can pass through coal spout in time by Action of Gravity Field, enter burner hearth, effectively prevent bunker coal from coal breakage pipeline section, piling up caking.
The effect of air-supply arrangement: bend pipe district is that coal spout is than the position being easier to block, to this, ajutage is added in bottom surface, bend pipe district, coal dust block air feeding pipe simultaneously in order to avoid falling, deflector being set above ajutage, the coal dust flow guiding on the one hand for falling, making the wind of ajutage siphunculus blow out along the air-supply gap between stream stream plate and coal spout tube wall on the other hand downwards, avoid local accumulation, promote hurtling down of coal dust.Further, be provided with multiple guide duct in coal spout perimembranous, the angle of guide duct and coal spout tube wall is preferably 15 ~ 60 °, to ensure that wind forms Dual-Phrase Distribution of Gas olid with coal dust after entering pipeline, enters burner hearth fast, prevents coal from blocking further and caking.
Described ajutage and guide duct through pipeline be connected with high pressure air inlet valve and low pressure air inlet valve respectively.According to concrete operating mode by high pressure air inlet valve and low pressure air inlet valve conversion aspiration pressure, can adopt high pressure air intake when blocking serious in coal spout, otherwise low pressure air intake can be used; Further, pipeline can install additional heater air intake is heated, make the air intake entered in coal spout be hot blast, while blowing, by hot blast bunker coal carried and keep the atmosphere of coal spout drying, strengthen the effect of supply air system further, coal spout is more not easily blocked; Even if when coal spout stopping state occurs, high pressure cold wind can be passed into and blow thin to blocking place high pressure, or pass into that high-pressure hot wind is dried blocking place, high pressure blows thin, thus strengthen and blow thin function, more fast quick-recovery coal spout unimpeded.
The utility model can solve the problem of coal spout frequent chute blockage when bunker coal moisture content height, and when chute blockage situation occurs, also coal spout can be dredged without the need to shutdown maintenance.This structure is simple, be easy to control, and is applicable to various bunker coal, and simple, and cost is low, and improvement expenses is low, thoroughly solves the problem of circulating fluid bed boiler coal drop pipe chute blockage.
Accompanying drawing explanation
Fig. 1 is traditional coal feeder structural representation
Fig. 2 is the utility model structural representation.
Fig. 3 is the A portion enlarged drawing of Fig. 2.
Fig. 4 is the B portion enlarged drawing of Fig. 2
Wherein: 1. coal sliding tube, 2. coal spout, 3. expansion joint, 4. water-cooling wall, 5. vibrator, 6. bend pipe district, 7. blow gap, 8. spring support, 9. heater, 10. guide duct, 11 high pressure air inlet valves, 12. ajutages, 13. deflectors, 14. low pressure air inlet valves, 15. bypasses.
Detailed description of the invention
Coal spout 2 is connected with the burner hearth of CFBB through coal sliding tube 1, water-cooling wall 4, described coal spout 2 epimere has bend pipe district 6, described coal spout 2 has rapping apparatus and air-supply arrangement, and described rapping apparatus comprises at least one vibrator 5 of being located at coal spout 2 bottom surface and is located at the expansion joint 3 at coal spout two ends and the spring support 8 for supporting coal spout 2.Described vibrator can uninterruptedly or discontinuously rapping coal spout 2, by vibrator 5 constantly rapping coal spout 2, prevent bunker coal from stopping in coal spout, enable bunker coal by Action of Gravity Field in time by coal spout 2, enter burner hearth, effectively prevent bunker coal from coal spout 2, piling up caking, utilize expansion joint 3 to ensure the reliability that coal breakage pipe end connects under rapping state, utilize spring support 8 to ensure the reliability that coal spout 2 is reinforced.
Described air-supply arrangement comprises the ajutage 12 being located at bottom surface, coal spout 2 bend pipe district 6 and the multiple guide ducts 10 being located at coal spout 2 perimembranous, after blowing in coal spout cold wind can be made to enter pipeline by ajutage 12 and guide duct 10, Dual-Phrase Distribution of Gas olid is formed with coal dust, enter burner hearth fast, prevent coal from blocking further and caking.Further the bending radius of described coal spout 2 bend pipe district 6 bend pipe being arranged on is 1 ~ 5D, is beneficial to the order landing of bunker coal, reduces the possibility of blocking; Deflector 13 is provided with above described ajutage 12, the front end of described deflector 13 is connected with coal spout 2 tube wall, rear end and coal spout tube wall tool are blown gap 7, described air-supply gap 7 is preferably 3 ~ 20mm, the wind passed into through ajutage 12 can blow out through the air-supply gap between deflector 13 and coal spout 2 tube wall, avoids the accumulation of bunker coal in coal spout 2.
Described guide duct 10 evenly can be arranged on side or the surrounding of coal spout 2, can arrange multiple, and preferably on coal spout, every 0.3 ~ 2m arranges 1 ~ 4, and each guide duct 10 is 15 ~ 60 ° with the angle α of coal spout 2 tube wall.Described ajutage 12 is connected with high pressure air inlet valve 11 and low pressure air inlet valve 14 respectively with the pipeline of guide duct 10 through adding heater 9 (being provided with bypass 15) simultaneously, the object basis of heater 9 being arranged bypass 15 is when not needing to heat cold wind, logical bypass 15 passes in guide duct 10 and/or ajutage 12 without heater 9 for high pressure or low pressure cold wind, hinders 12 power to reduce ajutage.High pressure cold wind or low pressure cold wind can be introduced respectively by Valve controlling like this, then add thermosetting high-pressure hot wind or low-pressure hot wind through heater 9 pairs of high pressure cold wind or low pressure cold wind.Heater 9 has two effects, and one is heated low pressure cold wind by heater, forms low-pressure hot wind, to be carried and maintains the dry atmosphere of coal spout, strengthen the effect of supply air system further, coal spout is more not easily blocked by hot blast to bunker coal.Two is when coal spout 2 stopping state is more serious, is heated by high pressure cold wind by heater 9, and logical high-pressure hot wind is dried blocking place, high pressure blows thin, thus thin function is blown in enhancing, and quick-recovery coal spout 2 is unimpeded more soon.
For the method for operating under different operating mode, for reference only, conduct does not limit following method of operating:
1. as the moisture content≤6%wt of bunker coal, vibrator 5 can be only driven, under the effect of rapping and gravity, coal boiler can be sent into smoothly;
2. as the moisture content > 6%wt of bunker coal and≤10%wt time, vibrator 5 and low pressure air inlet valve 11 can be opened, while rapping, by low pressure cold wind in ajutage 12 and guide duct 10, coal can be sent into boiler smoothly
3. as the moisture content > 10%wt of bunker coal, the moisture content of coal has generally exceeded the design and operation scope of coal spout 2, can according to actual conditions, now open on the basis of the 2nd and open the low pressure cold wind that heater 9 makes to pass into simultaneously and be heated to be low-pressure hot wind, to ensure that coal spout is unimpeded.Or on the basis of the 2nd, close low pressure air inlet valve 14, open high pressure air inlet valve 11, pass into high pressure cold wind, heater 9 even simultaneously, to pass into high-pressure hot wind, to ensure that coal spout is unimpeded.
4. when coal spout is blocked, on the basis of the 2nd, close low pressure air inlet valve 11, open high pressure air inlet valve 14, in coal spout 2, pass into high pressure cold wind, blown the rapping of dredging with vibrator 5 by high pressure cold wind, coal spout can be loosened.If when coal spout 2 blocks serious, then start heater 9 simultaneously, dried by high-pressure hot wind, blow and to dredge and rapping can loosen coal spout fast, make bunker coal in the burner hearth of coal spout 2, coal sliding tube 1 input boiler in time.
The utility model is implemented in certain project, before transformation, because the local humidity of bunker coal is up to 16.8%wt, the average plugging per hour of coal spout 2 once, after using the utility model transformation, continuous operation 6 is monthly there is not serious plugging phenomenon, after there is plugging situation once in a while, can be dredged in time by aforesaid operations method.
Claims (8)
1. a coal feeder for circular fluidized bed boiler, comprise the coal spout and coal sliding tube that connect successively, described coal spout epimere has bend pipe district, it is characterized in that, described coal spout has rapping apparatus and air-supply arrangement, and described rapping apparatus comprises at least one vibrator being located at coal spout bottom surface and the expansion joint being located at coal spout two ends; Described air-supply arrangement comprises the ajutage being located at bottom surface, coal spout bend pipe district and the multiple guide ducts being located at coal spout perimembranous.
2. coal feeder for circular fluidized bed boiler as claimed in claim 1, it is characterized in that, described rapping apparatus also comprises the spring support for supporting coal spout.
3. coal feeder for circular fluidized bed boiler as claimed in claim 1, it is characterized in that, the bending radius of described coal spout bend pipe district bend pipe is 1 ~ 5D.
4. coal feeder for circular fluidized bed boiler as claimed in claim 1, it is characterized in that, be provided with deflector above described ajutage, the front end of described deflector is connected with coal spout tube wall, and rear end and coal spout tube wall tool are blown gap.
5. coal feeder for circular fluidized bed boiler as claimed in claim 4, it is characterized in that, described air-supply gap is 3 ~ 20mm.
6. coal feeder for circular fluidized bed boiler as claimed in claim 1, it is characterized in that, the angle of described guide duct and coal spout tube wall is 15 ~ 60 °.
7. the coal feeder for circular fluidized bed boiler as described in any one of claim 1-6, is characterized in that, described ajutage is connected with high pressure air inlet valve and low pressure air inlet valve through pipeline respectively with guide duct.
8. coal feeder for circular fluidized bed boiler as claimed in claim 7, is characterized in that, described pipeline is equipped with heater and is provided with bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049490.4U CN204513372U (en) | 2015-01-23 | 2015-01-23 | Coal feeder for circular fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049490.4U CN204513372U (en) | 2015-01-23 | 2015-01-23 | Coal feeder for circular fluidized bed boiler |
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| CN204513372U true CN204513372U (en) | 2015-07-29 |
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| CN201520049490.4U Active CN204513372U (en) | 2015-01-23 | 2015-01-23 | Coal feeder for circular fluidized bed boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927974A (en) * | 2016-06-24 | 2016-09-07 | 无锡华光锅炉股份有限公司 | Coal clogging-resistant coal feeder of circulating fluidized bed |
| CN106402845A (en) * | 2016-10-28 | 2017-02-15 | 杭州红山热电有限公司 | Boiler burning system |
| CN107062208A (en) * | 2017-05-27 | 2017-08-18 | 贵州新能源开发投资股份有限公司 | It is a kind of suitable for fluid bed Wu Du Sai Give device for coal |
| CN109051384A (en) * | 2018-09-21 | 2018-12-21 | 中节环立为（武汉）能源技术有限公司 | A kind of anti-blocking powder dust feeder |
-
2015
- 2015-01-23 CN CN201520049490.4U patent/CN204513372U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927974A (en) * | 2016-06-24 | 2016-09-07 | 无锡华光锅炉股份有限公司 | Coal clogging-resistant coal feeder of circulating fluidized bed |
| CN106402845A (en) * | 2016-10-28 | 2017-02-15 | 杭州红山热电有限公司 | Boiler burning system |
| CN107062208A (en) * | 2017-05-27 | 2017-08-18 | 贵州新能源开发投资股份有限公司 | It is a kind of suitable for fluid bed Wu Du Sai Give device for coal |
| CN109051384A (en) * | 2018-09-21 | 2018-12-21 | 中节环立为（武汉）能源技术有限公司 | A kind of anti-blocking powder dust feeder |
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